

There’s an extremely powerful backdoor in every processor/chipset. Intel named it “Management Engine” and AMD “Secure Technology”.
From the Wikipedia page on Management Engine:
The ME has its own MAC and IP address for the out-of-band management interface, with direct access to the Ethernet controller; one portion of the Ethernet traffic is diverted to the ME even before reaching the host’s operating system.
ME has Serial over LAN, so it’s possible that attackers can have a more intimate access to your hardware than your Operating System.
I imagine other manufacturers have similar frameworks.
“Good” cops become automatically bad just by failing to police their own. One single openly bad cop is enough to make ALL of them bad. They have way too much power to be allowed one single abuse, let alone a systematic persecution of poor people.